RallyIQ

Game plan

Rebecca Marino v Liudmila Samsonova

Every number combines what Rebecca Marino does well with what Liudmila Samsonova allows, each measured against the tour average and shrunk toward it when the sample is thin. Flip perspective

Forecast

Rebecca Marino wins, best of 3 26%90%: 8%–56% · best of 5: 21%
Serve points won 58.9% / 63.9% Rebecca / Liudmila · tour 58.1%
Strengths only, no similarity priors 26%serve 58.9% / 63.9%

Each player's serve and return strength is fitted against every opponent they were charted against, so a record built on weak opponents counts for less. At least one of them is no longer active or has too little charted in the last three seasons, so both are compared on their careers. The result is then nudged by Rebecca Marino's record against Liudmila Samsonova's tactical lookalikes and in their charted head-to-heads. A game-by-game Markov chain turns point odds into match odds; the 90% range covers the uncertainty in the two strengths, not the nudges. Charted matches lean toward big events, so treat this as a scouting estimate, not a betting line.

Head to head, per 100 shots

CareerRebeccaLiudmila
Direction choice−0.18 ±0.10
better than 20%
−0.05 ±0.05
better than 46%
Shot selection+0.03 ±0.15
better than 48%
+0.65 ±0.06
better than 97%
Execution−0.84 ±0.52
better than 23%
−1.48 ±0.54
better than 10%
Points left on the table2.70 ±0.11
lower than 33%
2.55 ±0.08
lower than 60%

Each player's career against an average tour player in the same position, adjusted for opponent strength, with a 90% margin (shots clustered by match). Points left on the table is the gap to the best-value direction for the same stroke, so lower is better. Percentiles are within each player's own tour. A side is highlighted only when the gap is larger than the margin on the difference.

Structural compatibility

Expected edge per 100 rally shots from style alone: Rebecca Marino −2.52, Liudmila Samsonova −2.44. Each player's shot mix weighted by their own skill with each shot and by how much the other gives up against it. This is why some rankings gaps don't hold in a given matchup.

Serve plan

The share of points the server wins when a first serve lands in that direction (hover a rate for its 90% interval; ± is the 90% margin). "Matchup" combines the server's rate with how this returner handles that serve. "Optimal" is the mix that wins most against this returner once they start reading a habit, at the response measured across the tour, and only within the range servers' habits actually vary. The gain over the current mix is how exploitable that mix is.

Rebecca Marino serving

Deuce court

1st serveNowRebecca winsv LiudmilaMatchupOptimal
Wide45%65%69%68.1%±6.460% ▲
Body11%65%57%64.5%±10.40% ▼
T44%75%71%77.1%±6.340% ▼

Optimal v Liudmila Samsonova: +0.4±0.9 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +5.4 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowRebecca winsv LiudmilaMatchupOptimal
Wide48%77%65%76.4%±6.361% ▲
Body10%56%60%59.9%±11.40% ▼
T42%72%65%72.4%±6.539% ▼

Optimal v Liudmila Samsonova: +0.6±0.8 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +3.3 per 100 first serves in before the returner adjusts.

Liudmila Samsonova serving

Deuce court

1st serveNowLiudmila winsv RebeccaMatchupOptimal
Wide51%69%63%66.8%±6.150%
Body16%66%55%63.8%±8.81% ▼
T34%81%65%78.7%±6.649% ▲

Optimal v Rebecca Marino: +0.4±1.0 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +8.4 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowLiudmila winsv RebeccaMatchupOptimal
Wide40%72%63%70.0%±7.239%
Body20%59%52%54.9%±9.45% ▼
T40%70%65%70.4%±6.656% ▲

Optimal v Rebecca Marino: +0.6±1.0 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +3.2 per 100 first serves in before the returner adjusts.

Return plan

Value of each return, in points per 100 returns against an average return of the same serve (direction, court, surface): the tour's result with that return, the returner's own edge with it, and what this server gives up when it comes back to that side. Returns with no charted direction are left out, so values compare with each other rather than with zero. Depth isn't a choice here: missed returns have no depth. Serve quality isn't charted, so a block through the middle partly reflects the serve that forced it.

Rebecca Marino returning

1st serve to the forehand

ReturnNowTourOwnv LiudmilaValue
FH through the middle61%+4.2−0.1−0.6+3.5±2.4
FH crosscourt20%+5.3−2.3+0.5+3.6±4.2
FH down the line18%+1.5−0.2−5.9−4.5±4.6
FH slice through the middle1%−6.7−1.4−0.8−9.0±1.9

Lean FH crosscourt: +1.6±3.7 per 100 returns v the current mix (337 returns charted, inside the 90% margin)

1st serve to the backhand

ReturnNowTourOwnv LiudmilaValue
BH through the middle49%+6.0−0.1−2.6+3.4±2.5
BH crosscourt26%+7.7+3.8−2.0+9.5±3.5
BH down the line12%+2.2−1.3−1.7−0.8±4.4
BH slice through the middle7%−6.2−1.5−1.4−9.1±2.3
BH slice crosscourt6%−4.2−0.7−3.8−8.7±2.7

Lean BH crosscourt: +6.5±2.9 per 100 returns v the current mix (198 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv LiudmilaValue
FH through the middle57%−3.2+1.8−0.9−2.3±2.8
FH crosscourt35%+0.5+2.1−0.6+2.0±4.2
FH down the line9%−0.6−1.7−0.5−2.8±4.2

Lean FH crosscourt: +2.9±3.2 per 100 returns v the current mix (69 returns charted, inside the 90% margin)

2nd serve to the backhand

ReturnNowTourOwnv LiudmilaValue
BH through the middle47%−2.6+1.6−2.0−3.0±2.4
BH crosscourt41%+1.5+0.4−3.6−1.7±3.3
BH down the line12%−0.5+1.0−2.4−1.9±4.6

Lean BH crosscourt: +0.7±2.3 per 100 returns v the current mix (93 returns charted, inside the 90% margin)

Liudmila Samsonova returning

1st serve to the forehand

ReturnNowTourOwnv RebeccaValue
FH through the middle55%+4.2−1.2+1.3+4.3±2.5
FH down the line22%+1.5−4.5−3.0−6.0±4.5
FH crosscourt21%+5.3±0.0−3.9+1.5±4.1
FH slice through the middle2%−6.7−2.0−0.1−8.7±2.3

Lean FH through the middle: +3.1±1.7 per 100 returns v the current mix (633 returns charted)

1st serve to the backhand

ReturnNowTourOwnv RebeccaValue
BH through the middle51%+6.0−1.7−1.9+2.5±2.4
BH crosscourt25%+7.7−0.1−2.6+4.9±3.4
BH down the line18%+2.2−2.2−2.0−2.0±4.4
BH slice through the middle3%−6.2−0.7−0.8−7.7±2.3
BH slice down the line2%−12.5−0.4±0.0−12.9±1.9

Lean BH crosscourt: +3.3±3.0 per 100 returns v the current mix (655 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv RebeccaValue
FH through the middle58%−3.2−0.6+0.1−3.7±3.1
FH crosscourt27%+0.5−2.2+0.5−1.2±4.3
FH down the line15%−0.6−2.2−1.9−4.6±4.8

Lean FH crosscourt: +2.0±3.7 per 100 returns v the current mix (108 returns charted, inside the 90% margin)

2nd serve to the backhand

ReturnNowTourOwnv RebeccaValue
BH through the middle48%−2.6−1.3+1.3−2.5±2.4
BH crosscourt30%+1.5−1.1+0.7+1.1±3.5
BH down the line13%−0.5−3.6+0.2−3.9±5.3
FH through the middle6%−2.7−1.4+0.1−3.9±2.5
FH inside-in2%+0.7−0.4+0.5+0.8±3.8

Lean BH crosscourt: +2.8±2.8 per 100 returns v the current mix (372 returns charted, inside the 90% margin)

Rally plan

Edge, in points per 100 shots: the hitter's skill with the shot (own) plus how much the receiver usually gives up against it (theirs), both measured against the tour average on grass. Each player's grass record is shrunk toward their all-surface one, so a thin sample on it moves the numbers only a little.

Rebecca Marino

Favour

ShotEdgeOwnTheirs
BH to the middle · serve +1+1.0±3.0+0.6+0.4
FH to the middle · serve +1+0.9±3.0−0.8+1.8
FH to their forehand · rally+0.1±3.5−1.7+1.8
BH to their backhand · rally−0.2±3.8−0.5+0.3
FH to the middle · return−0.4±2.8+1.6−2.0
FH to the middle · return +1−1.0±3.2−4.1+3.1

Avoid

ShotEdgeOwnTheirs
BH to their forehand · rally−9.7±5.4−2.6−7.2
BH to their backhand · return +1−7.7±4.5−2.9−4.8
BH to their forehand · return−6.3±5.3−1.7−4.6
BH to the middle · return−6.0±2.8−0.2−5.9
BH to their backhand · return−5.9±4.2+1.7−7.6

Liudmila Samsonova

Favour

ShotEdgeOwnTheirs
FH to the middle · return+0.2±2.7−0.3+0.5
BH to the middle · return +1−0.5±3.0−1.2+0.7
FH to their forehand · rally−0.5±3.4±0.0−0.5
FH to the middle · return +1−0.8±3.2−1.2+0.5
FH to their backhand · serve +1−0.9±4.5−0.5−0.4
BH to their backhand · return−1.2±4.0+0.3−1.5

Avoid

ShotEdgeOwnTheirs
FH to their backhand · return−12.9±5.1−9.4−3.6
BH to their forehand · serve +1−8.7±5.9−4.3−4.5
FH to their forehand · serve +1−6.8±4.3−5.8−1.0
BH to their backhand · rally−6.0±3.7−4.2−1.9
BH to their backhand · serve +1−4.8±4.3−3.4−1.4

Against Liudmila Samsonova-like opponents

Rebecca Marino vMatchesServe pts wonReturn pts won
All charted opponents–61.1%41.8%

Similar by tactical fingerprint: Madison Keys, Xin Yu Wang, Jessica Bouzas Maneiro, Lulu Sun, Petra Kvitova, Jule Niemeier, Caroline Garcia, Sabine Lisicki, Coco Vandeweghe. When two players have rarely met, their records against these lookalikes fill the gap.